Sash lock



Dec. 1, W25. 3564323 R. CURTHSV ma BASH LOCK Filed. May 6, 1925 INVENTOR f fiv'F/IZ ATTORNEYS Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE.

ROBERT CURTIS, SR., OF JERSEY CITY, NEW JERSEY, ASSIGNOR OF ONE-HALF TO WILLIAM A. I-IAGER, OF JERSEY CITY, NEW JERSEY.,

SASI-I Loan.

Application filed May 6, 1925. Serial N0. 28,442.

To all whom it may concern:

Be it known that I, RoBnRr CURTIS, Sn, a citizen of the United States of America, and resident of Jersey City, in the county of Hudson and State of New Jersey, have in vented a new and Improved Sash Look, of

which the following is a full, clear, and

exact description.

This invention relates to sash locking de vices and has particular reference to an improvement in devices of this character which constitute means for establishing an adjustable locking connection between the upper and lower sashes whereby the same may be retained in partially opened condition against further relative movement to a further open position.

One of the principal difficulties encountered in providing window sashes with locking devices of this character has been due to the fact that the sashes have a relative movement caused by shrinkage of the wood or other agencies and hence interengaging locking devices provided on the sashes do not properly register.

It is therefore one of the principal objects of the present invention to provide means in conjunction with said interengaging elements which insure a proper registry thereof.

As a further object the invention comprehends sash locking means of the character set forth which is automatically rendered operable upon a predetermined relative movement of the sashes to an open position.

The invention further aims to provide a sash locking device of the character set forth which is comparatively simple in its construction and mode of operation, inexpensive to manufacture and install and which is thoroughly reliable and highly efficient in its purpose.

WVith the above recited and other objects in view, reference is had to the following specification and drawings in which there is exhibited one example or embodiment of the invention which is in no way intended as a limitation upon the scope of the appended claims as it is to be clearly understood that variations and modifications which properly fall within the scope of said claims may be resorted to when found expedient.

In the drawings Figure 1 is a fragmentary vertical sectional view through a window structure equipped with a sash locking device constructed in accordance with the invention.

Fig. 2 is a horizontal fragmentary sectional view taken approximately on the line indicated at 22 in Fig. 1.

Fig. 3 is an enlarged detail vertical sectional view through the locking element carried by the lower sash and taken approximately on the line 33 of Fig. 4.

Fig. 4 is a horizontal sectional view taken approximately on the line H of Fig. 3.

Fig. 5 is a face view of the lower sash element.

Referring to the drawings by characters of reference A designates the upper cross rail of a lower sash and B the lower cross rail of an upper sash which are respectively provided'with corresponding or mating inclined beveled faces C and D. i To the upper cross or meeting rail A a sash locking element designated generally by the character 10 is applied and said element consists of a housing which includes a bottom wall 11, a top wall 12, side walls 13 and front and rear walls 14: and 15. Mounted within the housing and slidable forwardly and rear wardly thereof on the bottom wall 11 isa locking bolt 16 which is movable between the wall 11 and a substantially inverted U-shaped guide 17 for projection or retraction of its upwardly beveled rearmost extremity 18 through an opening 19 in the rear wall 1.5. The bolt is normally urged in a rearward direction to project 7 the beveled extremity 18 through the opening 19 by means of a coiled expansion spring 20 interposed between the front wall '14 and the head 21 at the forward end of the bolt, said coiled spring surrounding a reduced guide stem 22 which extends through a guide opening 23 in the front wall of the housing. In order to provide means for manually retracting the extremity 18 within the housing, a vertical stem 2 1 is connected with the bolt and protrudes through a slot 25 inthe upper wall 12, the exposed terminal carrying a conical manipulating head 26. In order to provide means for retaining the bolt in retracted position, a latch 27 is pivoted as 2.1528 to one of the ears 29 projecting upwardly from the U-shaped guide 17. Ijhe latch is interchangeably associated w1th either of the ears 29 so that the element 10 is capable of use on either side of the W111- dow. A coiled contractile spring efi'ects a normal engagement of the latch with the head 21 of the bolt when the same is retracted to retain said bolt in retracted position. The rearmost terminal of the latch 27 has pivoted thereto a tail piece 31 which is freely swingable in an upward direction vid'ed with a downwardly projecting extension 35 which isap'ertured to receive a screw or other fastening element 36 and said downward extension 35-is laterally flared and provided with marginal rearwardly projecting side flanges 37 which are of gradually increasing width from the lower to the upper ends".

Attached to one of the vertical side rails E or to the center vertical rail of the upper sash, is a rack bar 38 having rack teeth 39 and provided with a detachably associated handle 4'0 which together with the upper end of the rack bar is secured by a fastening screw 41 to the side or center rails of the upper sash. The lower end of the rack bar is secured in a similar manner by a fastening screw 42.

In use and operation of the device, when the sashes are in fully closed relation, the rearmost beveled extremity 18 of the bolt engaging with the lowermost tooth of the rack bar serves to lock the sashes against relative movement to an open position from the exterior. hen it is desired to open the window by relative movement of the sashes, the knob or handle 26 is manipulated to retract the extremity 18, the latch 27 engaging the head 21 to hold the bolt retracted. Relative movement of the upper and lower sashes to open position is freely accomplished, and lowering movement of the upper sash may be facilitated by grasping the handle 40. The handle further acts in the capacity of a trip element so that when the tail piece 31 has passed beyond the handle relative movement of the windows to a closing position causes the tail piece to be tripped by the handle thereby disengaging the latch-and throwing, the bolt 16 into action. Under this arrangement it is obvione that relative movement of the windows to a further open position is precluded without manipulating the knob 26 and it is further obvious that the sashes may be locked in partially opened position. extension 35 and marginal side flanges 37 serve as a flared guide means for bringing the bolt terminal 18 into relative alinement with the teeth of the rack bar 38 in event that play or looseness of the sashes has caused a misalinement thereof.

I claim: v

1. A sash lock comprising interengageable locking elements carried respectively by the upper and lower sashes for locking the same in closed or partially closed relation against relative movement to a further opened position and guide means carried by one of said elements for coacting engagement with the other element to effect the alinement or registry of the elements with each other when out of alinement.

2. A sash lock comprising a spring pressed bolt carried by the upper end of the lower sash of a window and a rack bar carried by the lower portion of the upper sash and guide means carried by the lower sash for effecting the alinement of the bolt terminal with the rack bar in event of misalinement thereof due to lateral play in the sashes.

3. A sash lock comprising aspring The pressed bolt carried by the upper end of the lower sash of a window and a rack bar carried by the lower portion of the upper sash; of a window constituting interengageable means for locking the sashes in closed or partially opened condition against move ment to fully opened condition, means for retaining the bolt in retracted inactive position and an element at the upper end of the rack bar engageable with said means for releasing the same to render the bolt active upon relative movement of the sashes beyond a predetermined distance.

4. A sash lock comprising a spring pressed bolt carried by the upper end of the lower sash of a window and a rack bar car ried by the lower portion of the upper sash of a window constituting interengageable means for locking the sashes in closed or partially opened condition against movement to fully opened condition, means for retaining the bolt in retracted inactive position, an element at the upper end of the rack bar engageable with said means for releasing the same to render the bolt active upon relative movement of the sashes beyond a predetermined distance, and guide means carried by the lower sash for effecting the alinement of the bolt terminal with the rack bar in event of misalinement thereof due to lateral play in the sashes.

ROBERT CURTIS, sR. 

